We assume that the reader is already familiar with the task of an
index processor and has basic experience in using a markup-based
document preparation systems such as TeX/LaTeX [1, 2],
the roff-family, or SGML-based systems (e.g. its instance HTML).

This document is structured as follows. The second part gives an
overview on the index model that is used by our system and we define
general concepts and terms. The third part contains a list of all
index style commands, their syntax, and a description of their
purpose. The reader should at least have read the first part of the
manual to understand the basic terminology to be able to use the
command reference. The fourth
part describes the different processing phases the system runs
through.

Invocation of xindy is not explained here. Please refer to the
manual pages of the commands xindy, texindy,
makeindex4, and to the 2nd edition of the LaTeX Companion. The
xindy Web Site has more documentation, too.